No 4, Vol. 5, 2004 


Gang-qin Shao, Xing-long Duan, Ji-ren Xie, Xiao-hua Yu, Wei-feng Zhang and Run-zhang Yuan

State Key Laboratory of Advanced Technology for Materials Synthesis & Processing,
Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, P. R. China


The aim of this work is to investigate the mechanism of densification of WC-Co nanocomposite at temperatures about the liquid-solid boundary. The processing method of spray thermal decomposition - continuous reduction & carburization was used to produce the nanocrystalline WC-Co composite powder. They were sintered in vacuum with SIP or with HIP treatment. Density, hardness, transverse rupture strength, magnetic saturation induction and magnetic coercivity were measured. The microstructure of the sintered composites were studied by SEM and TEM. Results show that the chemical-uniformly dispersed particles and the formation of liquid phase at lower temperatures play a crucial role in low temperature consolidation.

full paper (pdf, 320 Kb)